Spruce chip reaction

The spruce chip reaction is a qualitative proof of pyrrole derivatives such as indole and furan .

A spruce chip moistened with hydrochloric acid turns red with fumes from pyrrole and its derivatives (e.g. indole ); hence the naming (Greek: pyrros: fire red, Latin: oleum: oil). Monosubstituted furans with a short alkyl chain turn green, more highly substituted furans turn permanganate red, and water turn blue or red-violet.

Individual evidence

1. ^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 411.
2. ↑ by Thomas Criegee, Wolfgang Kirmse, E. Kutter, Peter Müller, Heidi Müller-Dolezal, Alfred Hans Schöberl, Renate Stoltz, Hanna Söll, Theodor Wieland: Houben-Weyl Methods of Organic Chemistry Vol. II, 4th Edition . Georg Thieme Verlag, 2014, p. 470 ( limited preview in Google Book search).